Very large deformation - Poor Mesh Ratio - Remeshing Script

[Robi395]

I am currently working on a low velocity impact on a stratified structure with Abaqus 6.11 / Explicit.

Sketch of the structure:

I would like to evaluate the effects of the elastomer mechanical proprieties on the metal B damage.
So far, i have done a axissymmetric model with ALE mesh control which prevent element distortion due to the high Poisson coefficient of the elastomer.
However, ALE mesh control don't update the edge seed therefore the elastomer aspect ratio is very poor under the impact zone.

View of this phenomena:

To prevent this phenomena my goal is to:
(1) -stop the calculation
(2) -update the model with output geometry
(3) -remesh the elastomer
(4) -rebuild the model (Materials, Contacts...)
(5) -remap the new mesh with the data from the last increment
(6) -restart the calculation

I have only be able achieve (1) and (2) with Python but i am unable to remesh

This as certainly been done before, can someone help me?

Kind regards,

Robin

PS: English ins't my mother tongue, i have tried my best.

 

[JayTung]

Did you check the output geometry?
There should be some subroutines to remesh.

 

[rstupplebeen]

Depending on how much farther you need to deform you might be able to simply bias the mesh the other way for the undeformed mesh. I hope this helps.

Rob Stupplebeen

https://sites.google.com/site/robertkstupplebeen/

 

[Robi395]

Thanks a lot to both of you for taking the time to read my thread.

-To Jaytung:
I've looked at the output file, I don't see any way to remesh. Could you tell me where i can find this feature?

-To rstupplebeen:
I sadly need to go much farther (5 times more energy). I don't see what you mean by "bias the mesh the other way for the undeformed mesh".

Thanks,

Robin

 

[MechIrl]

What have you tried for remeshing? Does the python 'Part2DGeomFrom2DMesh' method not work?

 

[rstupplebeen]

Tall skinny elements to start and when they get squished they will be short squat elements.

Rob Stupplebeen

https://sites.google.com/site/robertkstupplebeen/

 

[abqMaster]

I did this before. Use python to extract the exterior boundary of the deformed specimens and call cae mesh modulus after in the same python. Then you can play with the newly generated mesh with whatever you want.

Contact abaqusdr@gmail.com if you want further help.